In some environments, it is widely believed that if the food is tailored to the different biochemical characteristics of a person’s blood group, better digestion will be guaranteed, energy is more efficiently dissolved, and excess fat is more quickly melted. Removing obesity improves health and reduces the risk of many diseases.
Is it true?
Probably only the last sentence is true – that obesity is bad. So far, I have not really found any scientific studies to support this. I find only the opposite conclusions – that there is no such connection between diet and blood groups.
This theory originated from the bestselling book of Dr. Peter D’Adamo. His book was published in 1996 and has already been translated into 52 languages, with over 7 million copies sold. Today it is still extremely popular and often customers tell us that they have followed a similar diet.
In fact, people follow diets… many of which we have not heard of.
In his book, the doctor states that each blood group carries the genetic characteristics of our ancestors, and that they are accumulated as a result of the food they used and thanks to which they survived. With that in mind, he recommends 4 different types of diet depending on blood type.
(Exactly how the blood types of the diet change is not described. Most likely because this cannot happen.)
Here are the general recommendations for different blood types:
Type A – People with this blood type should consume mostly plant foods and be deprived of red meat.
Type B – People with this blood type should consume plant food and meat (but cannot consume chicken and pork) and stop some dairy products. Wheat, corn, lentils, tomatoes should be avoided.
Type AB – People with this blood type, as a combination of the above two types, should consume seafood, tofu, dairy, legumes and some carbohydrate foods. They should exclude corn, certain types of legumes, beef and chicken.
Type 0 – People with this blood type should consume high-protein foods such as meat, fish, turkey, some fruits and vegetables. They should restrict some cereals, legumes and dairy foods.
I am sure that everyone who has achieved certain results with their health and weight has started to wonder what the dependency is on the recommendations for individual blood groups and find some contradictions.
Dr. D’Adamo tells how the benefits of this type of diet are supported by scientific arguments of biological, physiological, immunological and epidemiological nature. Lots of science and no empirical results. The science, in fact, lies in his personal opinion – he does not cite any sources that confirm this. Above is something like this text I am writing at the moment, except for the fact that I already have many cases and results in practice. But in them I find no connection with the blood type of people. And one more thing – those who have tried the blood type diet, that’s why they come to us – they have not had any results from the diet. The conclusion is “eye-popping”. People are so different that no blood group could unite them except in transfusions.
In 2013, scientists from the American Nutrition Society conducted a large-scale survey of 1,415 publications on these diets. The authors’ conclusion in the American Journal of Clinical Nutrition is this: “There is currently no evidence that adherence to blood type diets can bring any health benefits.” Sounds authoritative, doesn’t it?
However, I do not know the doctor and would not allow myself to talk about him, as scientists at the Norwegian Nutrition Society said at a seminar in 2001 that Dr. D’Adamo’s book was written with great “flair”.
In response, Dr. D’Adamo stated that he would fund a study on the effect of blood type diets on cancer, and that scientific facts about their healing properties were forthcoming. To date, however, there are no such scientific publications and facts.
Another major study is being conducted on 1455 people. There was an improvement in all but no matter the blood type, simply because all diets were relatively healthy compared to the previous lifestyle of the participants.
A review by Brazilian scientists looking for a link between blood groups and the immune system says Dr. D’Adamo’s “speculation” seems “fundamentally wrong”.
Okay, if they are fundamentally wrong, why are they so popular?
Well, because they touch a thin string in the dreams of more obese people – rapid weight loss. Blood group diets are part of the so-called “Fad diets” (manic diets, or actually called “cheat diets”) – attracting mostly people looking for very fast results, with promises to lose weight quickly, improve health and other benefits, people who don’t are interested in scientific evidence.
Another reason is the characteristics of the people of today’s most active generation – they tend to believe more in different “influencers” – charming people with a gift-word, attractive appearance, or both (in-depth knowledge of the area they are not talking about mandatory) than trusting professionals.
It is reassuring that none of the 4 types of blood type diets is harmful to health as long as it does not disrupt the diet. Even positive results are possible because of improved nutrition compared to a person’s previous lifestyle. But nothing to do with blood type.
However, if you still decide to try (we usually come with people who have tried everything 😉), especially if you have a disease (such as diabetes, osteoporosis), I strongly recommend consulting your doctor – dietary restrictions may conflict treatment and lead to large deficits.
These diets do not take into account the individual characteristics of a person (except for his blood type, but are not all people with the same blood type the same?), Are not in accordance with his health, his preferences for food, his food allergies and intolerances, are not in tune with his current lifestyle.
Nutritionists, doctors, and scientists who read (because there are some who have “stuck” in their bachelor’s or master’s textbooks) are now united in the fact that there is no evidence of the benefits promised by these diets.
The conclusion is that blood type and nutrition do not have proven dependencies, and we recommend eating well and in a balanced way, and in the event of difficulty doing so, trust our trainer to follow up – join in with minimal investment in our 7-day challenge and decide for yourself whether you can continue to pursue your dreams.